// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_AURA_H_
#define UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_AURA_H_

#include "base/compiler_specific.h"
#include "base/macros.h"
#include "ui/aura/window.h"
#include "ui/aura/window_observer.h"
#include "ui/views/controls/native/native_view_host_wrapper.h"
#include "ui/views/views_export.h"

namespace views {

class NativeViewHost;

// Aura implementation of NativeViewHostWrapper.
class VIEWS_EXPORT NativeViewHostAura : public NativeViewHostWrapper,
                                        public aura::WindowObserver {
public:
    explicit NativeViewHostAura(NativeViewHost* host);
    ~NativeViewHostAura() override;

    // Overridden from NativeViewHostWrapper:
    void AttachNativeView() override;
    void NativeViewDetaching(bool destroyed) override;
    void AddedToWidget() override;
    void RemovedFromWidget() override;
    void InstallClip(int x, int y, int w, int h) override;
    bool HasInstalledClip() override;
    void UninstallClip() override;
    void ShowWidget(int x, int y, int w, int h) override;
    void HideWidget() override;
    void SetFocus() override;
    gfx::NativeViewAccessible GetNativeViewAccessible() override;
    gfx::NativeCursor GetCursor(int x, int y) override;

private:
    friend class NativeViewHostAuraTest;

    class ClippingWindowDelegate;

    // Overridden from aura::WindowObserver:
    void OnWindowDestroying(aura::Window* window) override;
    void OnWindowDestroyed(aura::Window* window) override;

    // Reparents the native view with the clipping window existing between it and
    // its old parent, so that the fast resize path works.
    void AddClippingWindow();

    // If the native view has been reparented via AddClippingWindow, this call
    // undoes it.
    void RemoveClippingWindow();

    // Our associated NativeViewHost.
    NativeViewHost* host_;

    scoped_ptr<ClippingWindowDelegate> clipping_window_delegate_;

    // Window that exists between the native view and the parent that allows for
    // clipping to occur. This is positioned in the coordinate space of
    // host_->GetWidget().
    aura::Window clipping_window_;
    scoped_ptr<gfx::Rect> clip_rect_;

    DISALLOW_COPY_AND_ASSIGN(NativeViewHostAura);
};

} // namespace views

#endif // UI_VIEWS_CONTROLS_NATIVE_NATIVE_VIEW_HOST_AURA_H_
